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</a></div> <!----></nav>  <ul class="sidebar-links"><li><a href="/fe/" aria-current="page" class="sidebar-link">大前端学习路径 + B站资源整合</a></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>HTML</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>CSS</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>JavaScript</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>TypeScript</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ES6</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Vue</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Vue3</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>React</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>Webpack</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/fe/webpack/" aria-current="page" class="active sidebar-link">对webpack的理解？解决了什么问题？</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/fe/webpack/#一、背景" class="sidebar-link">一、背景</a></li><li class="sidebar-sub-header"><a href="/fe/webpack/#二、问题" class="sidebar-link">二、问题</a></li><li class="sidebar-sub-header"><a href="/fe/webpack/#三、是什么" class="sidebar-link">三、是什么</a></li><li class="sidebar-sub-header"><a href="/fe/webpack/#参考文献" class="sidebar-link">参考文献</a></li></ul></li><li><a href="/fe/webpack/build_process.html" class="sidebar-link">面试官：说说webpack的构建流程?</a></li><li><a href="/fe/webpack/Loader.html" class="sidebar-link">Loader</a></li><li><a href="/fe/webpack/Plugin.html" class="sidebar-link">Plugin</a></li><li><a href="/fe/webpack/Loader_Plugin.html" class="sidebar-link">Loader和Plugin的区别？编写Loader，Plugin的思路？</a></li><li><a href="/fe/webpack/HMR.html" class="sidebar-link">面试官：说说webpack的热更新是如何做到的？原理是什么？</a></li><li><a href="/fe/webpack/proxy.html" class="sidebar-link">面试官：说说webpack proxy工作原理？为什么能解决跨域?</a></li><li><a href="/fe/webpack/performance.html" class="sidebar-link">Webpack 性能优化</a></li><li><a href="/fe/webpack/improve_build.html" class="sidebar-link">面试官：如何提高webpack的构建速度？</a></li><li><a href="/fe/webpack/Rollup_Parcel_snowpack_Vite.html" class="sidebar-link">面试官：与webpack类似的工具还有哪些？区别？</a></li><li><a href="/fe/webpack/babel.html" class="sidebar-link">Babel</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Node.js</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>性能优化</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>手写代码</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="对webpack的理解-解决了什么问题"><a href="#对webpack的理解-解决了什么问题" class="header-anchor">#</a> 对webpack的理解？解决了什么问题？</h1> <p><img src="https://static.vue-js.com/898ed570-a578-11eb-85f6-6fac77c0c9b3.png" alt=""></p> <h3 id="_1-webpack"><a href="#_1-webpack" class="header-anchor">#</a> 1. Webpack</h3> <ul><li><a href="https://juejin.im/post/6844903588607557639" target="_blank" rel="noopener noreferrer">带你走进webpack世界，成为webpack头号玩家。<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li> <li><a href="https://juejin.im/post/6844903853905674248" target="_blank" rel="noopener noreferrer">关于webpack4的14个知识点,童叟无欺<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li></ul> <p>可以看做一个模块化打包机，分析项目结构，处理模块化依赖，转换成为浏览器可运行的代码。</p> <ul><li>代码转换: TypeScript 编译成 JavaScript、SCSS,LESS 编译成 CSS.</li> <li>文件优化：压缩 JavaScript、CSS、HTML 代码，压缩合并图片。</li> <li>代码分割：提取多个页面的公共代码、提取首屏不需要执行部分的代码让其异步加载。</li> <li>模块合并：在采用模块化的项目里会有很多个模块和文件，需要构建功能把模块分类合并成一个文件。</li> <li>自动刷新：监听本地源代码的变化，自动重新构建、刷新浏览器。</li></ul> <p>构建把一系列前端代码自动化去处理复杂的流程，解放生产力。</p> <h4 id="_1-1-webpack配置entry有几个"><a href="#_1-1-webpack配置entry有几个" class="header-anchor">#</a> 1.1 webpack配置entry有几个</h4> <h4 id="_1-2-webpack的构建流程"><a href="#_1-2-webpack的构建流程" class="header-anchor">#</a> 1.2 webpack的构建流程</h4> <p>webpack的构建流程包括compile、make、build、seal、emit阶段。</p> <ul><li>初始化参数: 从配置文件和 Shell 语句中读取与合并参数，得出最终的参数。</li> <li>开始编译: 根据我们的webpack配置注册好对应的插件调用 compile.run 进入编译阶段,在编译的第一阶段是 compilation，他会注册好不同类型的module对应的 factory，不然后面碰到了就不知道如何处理了。</li> <li>编译模块: 进入 make 阶段，会从 entry 开始进行两步操作：第一步是调用 loaders 对模块的原始代码进行编译，转换成标准的JS代码, 第二步是调用 acorn 对JS代码进行语法分析，然后收集其中的依赖关系。每个模块都会记录自己的依赖关系，从而形成一颗关系树。</li> <li>输出资源：根据入口和模块之间的依赖关系，组装成一个个包含多个模块的 Chunk，再把每个 Chunk 转换成一个单独的文件加入到输出列表，这步是可以修改输出内容的最后机会。</li> <li>输出完成：在确定好输出内容后，根据配置确定输出的路径和文件名，把文件内容写入到文件系统。</li></ul> <h4 id="_1-3-webpack和rollup有什么相同和不同点"><a href="#_1-3-webpack和rollup有什么相同和不同点" class="header-anchor">#</a> 1.3 webpack和rollup有什么相同和不同点？</h4> <h4 id="_1-4-介绍一下loader"><a href="#_1-4-介绍一下loader" class="header-anchor">#</a> 1.4 介绍一下Loader</h4> <p><a href="https://github.com/axuebin/articles/issues/38" target="_blank" rel="noopener noreferrer">前端工程师都得掌握的 webpack Loader<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>
Loader 的作用很简单，就是处理任意类型的文件，并且将它们转换成一个让 webpack 可以处理的有效模块。</p> <p>常用的Loader有：js-<code>babel-loader</code>、css-<code>style-loader``css-loader</code>、``</p> <p>Loader 可以在 webpack.config.js 里配置，也可以在 require 语句里内联；</p> <h5 id="_1-4-1-在config里配置"><a href="#_1-4-1-在config里配置" class="header-anchor">#</a> 1.4.1 在config里配置</h5> <p>Loader 可以在 webpack.config.js里配置，这也是推荐的做法，定义在 module.rules 里。</p> <p>每一条 rule 会包含两个属性：test 和 use，比如 { test: /.js$/, use: 'babel-loader' } 意思就是：当 webpack 遇到扩展名为 js 的文件时，先用 babel-loader 处理一下，然后再打包它。</p> <h5 id="_1-4-2-loader-类型"><a href="#_1-4-2-loader-类型" class="header-anchor">#</a> 1.4.2 Loader 类型</h5> <ol><li>同步Loader：this.callback()</li> <li>异步Loader：this.async()</li> <li>Pitching Loader：</li> <li>Raw Loader：</li></ol> <h4 id="_1-5-介绍一下plugin"><a href="#_1-5-介绍一下plugin" class="header-anchor">#</a> 1.5 介绍一下Plugin</h4> <p>通过插件，扩展 webpack，加入自定义的构建行为，使 webpack 可以执行更广泛的任务，拥有更强的构建能力。</p> <h4 id="_1-6-webpack-热更新是如何实现的"><a href="#_1-6-webpack-热更新是如何实现的" class="header-anchor">#</a> 1.6 webpack 热更新是如何实现的？</h4> <p><a href="https://juejin.im/post/6844904008432222215" target="_blank" rel="noopener noreferrer">轻松理解webpack热更新原理<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></p> <p>Hot Module Replacement，简称HMR，无需完全刷新整个页面的同时，更新模块。HMR的好处，在日常开发工作中体会颇深：节省宝贵的开发时间、提升开发体验。</p> <ol><li>webpack-dev-server启动本地服务：我们根据webpack-dev-server的package.json中的bin命令，可以找到命令的入口文件bin/webpack-dev-server.js。</li> <li>修改webpack.config.js的entry配置</li> <li>监听webpack编译结束</li> <li>webpack监听文件变化</li> <li>浏览器接收到热更新的通知</li> <li>HotModuleReplacementPlugin 或 --hot</li> <li>moudle.hot.check 开始热更新</li> <li>hotApply 热更新模块替换
<ul><li>删除过期的模块，就是需要替换的模块</li> <li>将新的模块添加到 modules 中</li> <li>通过__webpack_require__执行相关模块的代码</li></ul></li></ol> <h4 id="_1-7-webpack-层面如何做性能优化"><a href="#_1-7-webpack-层面如何做性能优化" class="header-anchor">#</a> 1.7 webpack 层面如何做性能优化</h4> <h4 id="_1-8-介绍一下-webpack-的-dll"><a href="#_1-8-介绍一下-webpack-的-dll" class="header-anchor">#</a> 1.8 介绍一下 webpack 的 dll</h4> <p>DLL动态链接</p> <p>第三库不是经常更新，打包的时候希望分开打包，来提升打包速度。打包dll需要新建一个webpack配置文件，在打包dll的时候，webpack做一个索引，写在manifest文件中。然后打包项目文件时只需要读取manifest文件。</p> <h4 id="_1-9-介绍一下-webpack-的-tree-shaking"><a href="#_1-9-介绍一下-webpack-的-tree-shaking" class="header-anchor">#</a> 1.9 介绍一下 webpack 的 tree-shaking</h4> <p>webpack 4 只需要配置mode为 <code>production</code>即可</p> <h2 id="一、背景"><a href="#一、背景" class="header-anchor">#</a> 一、背景</h2> <p><code>Webpack</code> 最初的目标是实现前端项目的模块化，旨在更高效地管理和维护项目中的每一个资源</p> <h4 id="模块化"><a href="#模块化" class="header-anchor">#</a> 模块化</h4> <p>最早的时候，我们会通过文件划分的形式实现模块化，也就是将每个功能及其相关状态数据各自单独放到不同的<code>JS</code> 文件中</p> <p>约定每个文件是一个独立的模块，然后再将这些<code>js</code>文件引入到页面，一个<code>script</code>标签对应一个模块，然后调用模块化的成员</p> <div class="language-html extra-class"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>module-a.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>module-b.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre></div><p>但这种模块弊端十分的明显，模块都是在全局中工作，大量模块成员污染了环境，模块与模块之间并没有依赖关系、维护困难、没有私有空间等问题</p> <p>项目一旦变大，上述问题会尤其明显</p> <p>随后，就出现了命名空间方式，规定每个模块只暴露一个全局对象，然后模块的内容都挂载到这个对象中</p> <div class="language-js extra-class"><pre class="language-js"><code>window<span class="token punctuation">.</span>moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
  <span class="token function-variable function">method1</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'moduleA#method1'</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>这种方式也并没有解决第一种方式的依赖等问题</p> <p>再后来，我们使用立即执行函数为模块提供私有空间，通过参数的形式作为依赖声明，如下</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token comment">// module-a.js</span>
<span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">$</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">var</span> name <span class="token operator">=</span> <span class="token string">'module-a'</span>

  <span class="token keyword">function</span> <span class="token function">method1</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>name <span class="token operator">+</span> <span class="token string">'#method1'</span><span class="token punctuation">)</span>
    <span class="token function">$</span><span class="token punctuation">(</span><span class="token string">'body'</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">animate</span><span class="token punctuation">(</span><span class="token punctuation">{</span> margin<span class="token operator">:</span> <span class="token string">'200px'</span> <span class="token punctuation">}</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  window<span class="token punctuation">.</span>moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
    method1<span class="token operator">:</span> method1
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">(</span>jQuery<span class="token punctuation">)</span>
</code></pre></div><p>上述的方式都是早期解决模块的方式，但是仍然存在一些没有解决的问题。例如，我们是用过<code>script</code>标签在页面引入这些模块的，这些模块的加载并不受代码的控制，时间一久维护起来也十分的麻烦</p> <p>理想的解决方式是，在页面中引入一个<code>JS</code>入口文件，其余用到的模块可以通过代码控制，按需加载进来</p> <p>除了模块加载的问题以外，还需要规定模块化的规范，如今流行的则是<code>CommonJS</code>、<code>ES Modules</code></p> <h2 id="二、问题"><a href="#二、问题" class="header-anchor">#</a> 二、问题</h2> <p>从后端渲染的<code>JSP</code>、<code>PHP</code>，到前端原生<code>JavaScript</code>，再到<code>jQuery</code>开发，再到目前的三大框架<code>Vue</code>、<code>React</code>、<code>Angular</code></p> <p>开发方式，也从<code>javascript</code>到后面的<code>es5</code>、<code>es6、7、8、9、10</code>，再到<code>typescript</code>，包括编写<code>CSS</code>的预处理器<code>less</code>、<code>scss</code>等</p> <p>现代前端开发已经变得十分的复杂，所以我们开发过程中会遇到如下的问题：</p> <ul><li>需要通过模块化的方式来开发</li> <li>使用一些高级的特性来加快我们的开发效率或者安全性，比如通过ES6+、TypeScript开发脚本逻辑，通过sass、less等方式来编写css样式代码</li> <li>监听文件的变化来并且反映到浏览器上，提高开发的效率</li> <li>JavaScript 代码需要模块化，HTML 和 CSS 这些资源文件也会面临需要被模块化的问题</li> <li>开发完成后我们还需要将代码进行压缩、合并以及其他相关的优化</li></ul> <p>而<code>webpack</code>恰巧可以解决以上问题</p> <h2 id="三、是什么"><a href="#三、是什么" class="header-anchor">#</a> 三、是什么</h2> <p><code>webpack</code> 是一个用于现代<code>JavaScript</code>应用程序的静态模块打包工具</p> <ul><li>静态模块</li></ul> <p>这里的静态模块指的是开发阶段，可以被 <code>webpack</code> 直接引用的资源（可以直接被获取打包进<code>bundle.js</code>的资源）</p> <p>当 <code>webpack</code>处理应用程序时，它会在内部构建一个依赖图，此依赖图对应映射到项目所需的每个模块（不再局限<code>js</code>文件），并生成一个或多个 <code>bundle</code></p> <p><img src="https://static.vue-js.com/9ce194a0-a578-11eb-85f6-6fac77c0c9b3.png" alt=""></p> <h4 id="webpack的能力"><a href="#webpack的能力" class="header-anchor">#</a> <code>webpack</code>的能力</h4> <p><strong>编译代码能力</strong>，提高效率，解决浏览器兼容问题
<img src="https://static.vue-js.com/c5c2d360-a592-11eb-ab90-d9ae814b240d.png" alt=""> <strong>模块整合能力</strong>，提高性能，可维护性，解决浏览器频繁请求文件的问题
<img src="https://static.vue-js.com/d306d260-a592-11eb-ab90-d9ae814b240d.png" alt=""> <strong>万物皆可模块能力</strong>，项目维护性增强，支持不同种类的前端模块类型，统一的模块化方案，所有资源文件的加载都可以通过代码控制
<img src="https://static.vue-js.com/e3c5a040-a592-11eb-ab90-d9ae814b240d.png" alt=""></p> <h2 id="参考文献"><a href="#参考文献" class="header-anchor">#</a> 参考文献</h2> <ul><li><a href="https://webpack.docschina.org/concepts/" target="_blank" rel="noopener noreferrer">https://webpack.docschina.org/concepts/<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li> <li><a href="https://zhuanlan.zhihu.com/p/267875652" target="_blank" rel="noopener noreferrer">https://zhuanlan.zhihu.com/p/267875652<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li> <li><strong><a href="https://juejin.cn/post/6844903966849892359" target="_blank" rel="noopener noreferrer">从 0 到 1 实现一款简易版 Webpack<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></strong></li> <li><strong><a href="https://juejin.cn/post/6844904023791796237" target="_blank" rel="noopener noreferrer">Webpack 设置环境变量的误区<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></strong></li></ul></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">更新时间:</span> <span class="time">12/14/2021, 10:12:35 AM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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